93 xle v6 FRUSTRATION DELUXE
 

I loved my XLE when I bought it....clean as a whistle, 107k miles (just broken in by 'yoda standards) leather interior, good factory speakers etc.....but it runs like a cripple when cold. until the temp needle gets to about 30% it has no balls whatsoever. Even after, it surges and stumbles at shifts (auto if you're wondering). Check engine light never comes on, so there's no code to scan... I've replaced the timing belt, cap, rotor, coolant temp sensor, fuel filter and catylitic converter. i've sprayed the hose between the air filter and intake with ether to check for leaks (looking for an idle-up). I'm at my witt's end here....any suggestions?...oh, and i'm new to the site, so what's up? I wanna love my car again so badly...thank god it's summer and I can ride my vintage motorcylce to work....but rain sucks and summer's nearly over.